For discount shoppers, the sign on the front of 75% Off Books probably says all it needs to say: Nothing Over $5. And it's no lie, no come-on that's proved false once you get inside. Everything in this place is 75 to 90 percent off the original price, and nothing costs more than $5. The books are all new, too, so there's no yellowed pages or musty smells wafting about. 75% Off Books buys its stock mostly as truckloads of assorted books from publishers. They're either overstock, samples left over from trade shows or books that have been slightly damaged in shipping. So it's not the place to go when you're looking for a specific title, but if you have the time, scour the tables at 75% Off Books; you might discover an armload of gems you didn't even know you needed. The store is also an excellent choice for parents and teachers. Each of the Dallas-area locations has up to 500 titles for children and young adults, and they both accept school district purchase orders. New titles arrive every week, so if you don't find anything on your first visit, keep looking; a second go-round might make all the difference.